| Contrast ratio | 1240:1 |
|---|---|
| Monitor model | Samsung 940BW |
| Submitted | 04 Feb 2009 23:18 CET, by 83.142.*.* |
| Camera model | Minolta DiMAGE A1 |
| Processing remarks | Note: image file 2: suggested exposure time: 1/240 s (Set EV to -0.6) |
| Black | |
| Screen photo |
|
| Luminance | 0.3 cd/m2 |
| Luminance spread | 0.07 cd/m2 (2 standard deviations) |
| Exposure value | –2.27 stops (aim for –2 to –3) |
| Exposure spread | 0.33 stops |
| Area used for calculation | 0.766 x 0.766 |
| Camera settings | Exposure time: 6 ISO: 100 F-number: 3.2 Focal length: 53 mm (35 mm equivalent) Exposure compensation: 0 |
| White | |
| Screen photo |
|
| Luminance | 374 cd/m2 |
| Luminance spread | 31 cd/m2 (2 standard deviations) |
| Exposure value | –0.9 stops (aim for –2 to –3) |
| Exposure spread | 0.12 stops |
| Area used for calculation | 0.766 x 0.766 |
| Camera settings | Exposure time: 1/80 ISO: 100 F-number: 3.2 Focal length: 53 mm (35 mm equivalent) Exposure compensation: 1 |
![[open image]](upload/cr004/01145a.jpg){kind=link}
![[open image]](upload/cr004/01145b.jpg){kind=link}
The luminance values in cd/m2 are not very reliable, since camera sensitivities can easily differ up to 50% from their nominal value. Typically, the real luminance is 30% lower than this number. The area used for calculation is chosen such that it corresponds to a viewing angle of ±14° horizontally and ±10.5° vertically, which is equivalent to viewing the screen from a distance of about 1.5 times the diagonal size.
Unfortunately, there is a lot of variation in how cameras use EXIF settings. If photos from your camera your produce unusable results, try coming back in a few days. I review submitted pictures regularly and try to fix problems.